2023
Phosphorites are mainly used by an agriculture industry (the production of phosphate fertilizers). They are also used, but with a much less importance, in a chemical industry as a raw material for the production of various phosphorus compounds.
In Poland phosphorites occur mainly in the form of calcium phosphate-rich nodules in the various types of sediments in the belt of the Albian (the Lower Cretaceous) outcrops at the north-eastern margin of the Holy Cross Mts. (vicinities of Radom-Iłża-Annopol-Gościeradów-Modliborzyce). They are used for the production of the natural phosphate fertilizers. The exploitation of phosphorites started in Poland between the First and the Second World War. However, nowadays any of deposit is being under exploitation due to the economic reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
The actual Polish limit values of the parameters that defines the phosphorites deposit (for deposits exploited by an underground method) establish that: the maximum depth of deposits documentation is 400 meters below the surface, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in Table 1.
Table 1. Qualitative parameters of the main phosphorites occurrencesThe abundance parameter deviates significantly from the limiting parameters that define the phosphorites deposit. Deposits are flooded which results in their potential exploitation, moreover, their significant parts have been built-up or covered by roads, railways and high-voltage lines. In extreme cases, it may cause the resources available for exploitations reduction as much as 50-80%. For these reasons, all of the phosphorites deposits were crossed out from “The balance…” in 2006 and the domestic demand for the phosphorites raw materials is fully covered by import. There is a lack of economic reasons for qualifying of phosphorites occurrences in Poland as prognostic resources. In light of the current balancing criteria the occurrences are not economically significant*.
Phosphorites were documented – on the basis of the more detailed deposit exploration – as one of the accompanying raw materials in a new geological documentation (supplement No 1) with recalculated resources of the glauconite-bearing sediments Niedźwiada II deposit approved in 2020. The deposit is located in Lubartów county in Lubelskie Voivodeship (Table 2). Phosphorites occur in the deposit in the form of hard phosphate concretions with irregular surface, of the grey-black color and with the granulation between 2 and 30 mm. The phosphate phase was defined as hydroxyapatite. These phosphorites are characterized by the high phosphorites content (the average content of P2O5 – 22.86%), with the limit values for phosphorites minimum 15% P2O5. In 2021, there was an exploitation concession issued for the Niedźwiada II deposit and, in the result, the economic resources in Poland increased by 7.33 thousand tonnes. However, the deposit has not been exploited so far and its resources in 2023 did not changed.
The state of the resources exploration and the state of the deposits development, together with the output amounts from particular deposits are presented in the Table 2.
Prepared by: Robert Bońda
* Gąsiewicz A., 2020 – ‘Fosforyty (phosphorites)’. In: ‘Bilans perspektywicznych zasobów kopalin Polski wg stanu na 31.12.2018 r.’ (eds. Szamałek K., Szuflicki M., Mizerski W.): 233-236. PIG-PIB, Warszawa [in Polish].
2022
Phosphorites are mainly used by an agriculture industry (the production of phosphate fertilizers). They are also used, but with a much less importance, in a chemical industry as a raw material for the production of various phosphorus compounds.
In Poland phosphorites occur mainly in the form of calcium phosphate-rich nodules in the various types of sediments in the belt of the Albian (the Lower Cretaceous) outcrops at the north-eastern margin of the Holy Cross Mts. (vicinities of Radom-Iłża-Annopol-Gościeradów-Modliborzyce). They are used for the production of the natural phosphate fertilizers. The exploitation of phosphorites started in Poland between the First and the Second World War. However, nowadays any of deposit is being under exploitation due to the economic reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
The actual Polish limit values of the parameters that defines the phosphorites deposit (for deposits exploited by an underground method) establish that: the maximum depth of deposits documentation is 400 meters below the surface, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in Table 1.
The abundance parameter deviates significantly from the limiting parameters that define the phosphorites deposit. Deposits are flooded which results in their potential exploitation, moreover, their significant parts have been built-up or covered by roads, railways and high-voltage lines. In extreme cases, it may cause the resources available for exploitations reduction as much as 50-80%. For these reasons, all of the phosphorites deposits were crossed out from “The balance…” in 2006 and the domestic demand for the phosphorites raw materials is fully covered by import. There is a lack of economic reasons for qualifying of phosphorites occurrences in Poland as prognostic resources. In light of an open-cast mining carried out throughout the world, as deposits for an underground mining – the occurrences are not economically significant*.
Phosphorites were documented – on the basis of the more detailed deposit exploration – as one of the accompanying raw materials in a new geological documentation (supplement No. 1) with recalculated resources of the glauconite-bearing sediments Niedźwiada II deposit approved in 2020. The deposit is located in Lubartów county in Lubelskie Voivodeship (Table 2). In 2021, there was an exploitation concession issued for the Niedźwiada II deposit and, in the result, the economic resources in Poland increased by 7.33 thousand tonnes. Phosphorites occur in the deposit in the form of hard phosphate concretions with irregular surface, of the grey-black color and with the granulation between 2 and 30 mm. The phosphate phase was defined as hydroxyapatite. These phosphorites are characterized by the high phosphorites content (the average content of P2O5 – 22.86%), with the limit values for phosphorites minimum 15% P2O5.
The state of the resources exploration and the state of the deposits development, together with the output amounts from particular deposits are presented in the Table 2.
Prepared by: Robert Bońda
* Gąsiewicz A., 2020 – ‘Fosforyty (phosphorites)’. In: ‘Bilans perspektywicznych zasobów kopalin Polski wg stanu na 31.12.2018 r.’ (eds. Szamałek K., Szuflicki M., Mizerski W.): 233-236. PIG-PIB, Warszawa [in Polish].
2021
Phosphorites are mainly used by an agriculture industry (the production of phosphate fertilizers). They are also used, but with a much less importance, in a chemical industry as a raw material for the production of various phosphorus compounds.
In Poland phosphorites occur mainly in the form of calcium phosphate-rich nodules in the various types of sediments in the belt of the Albian (the Lower Cretaceous) outcrops at the north-eastern margin of the Holy Cross Mts. (vicinities of Radom-Iłża-Annopol-Gościeradów-Modliborzyce). They are used for the production of the natural phosphate fertilizers. The exploitation of phosphorites started in Poland between the First and the Second World War. However, nowadays any of deposit is being under exploitation due to the economic reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
The actual Polish limit values of the parameters that defines the phosphorites deposit establish that: the maximum depth of deposits documentation is 400 meters below the surface, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in Table 1.
The abundance parameter deviates significantly from the limiting parameters that define the phosphorites deposit. Deposits are flooded which results in their potential exploitation, moreover, their significant parts have been built-up or covered by roads, railways and high-voltage lines. In extreme cases, it may cause the resources available for exploitations reduction as much as 50-80%. For these reasons, all of the phosphorites deposits were crossed out from “The balance…” in 2006 and the domestic demand for the phosphorites raw materials is fully covered by import. In the latest edition of The balance of prospective mineral resources of Poland there was lack of economic conditions for qualifying the phosphorites occurrences in Poland as the prognostic resources stated. In light of the current balancing criteria, such occurrences are not economically significant*.
Phosphorites were documented – on the basis of the more detailed deposit exploration – as one of the accompanying raw materials in the new geological documentation (supplement No. 1) with recalculated resources of the glauconite-bearing sediments Niedźwiada II deposit approved in 2020. The deposit is located in Lubartów county in Lubelskie Voivodeship (Table 2). Phosphorites occur in the deposit in the form of hard phosphate concretions with irregular surface, of the grey-black color and with the granulation between 2 and 30 mm. The phosphate phase was defined as hydroxyapatite. These phosphorites are characterized by the high phosphorites content (the average content of P2O5 – 22.86%), with the limit values for phosphorites minimum 15% P2O5. In 2021, there was a concession for the exploitation of phosphorites from the Niedźwiada II deposit issued and the economic resources were assessed to be equal 7.33 thousand tonnes.
The state of the resources exploration and the state of the deposits development, together with the output amounts from particular deposits are presented in the Table 2.
Prepared by: Robert Bońda
* Gąsiewicz A., 2020 – ‘Fosforyty (phosphorites)’. In: ‘Bilans perspektywicznych zasobów kopalin Polski wg stanu na 31.12.2018 r.’ (eds. Szamałek K., Szuflicki M., Mizerski W.): 233-236. PIG-PIB, Warszawa [in Polish].
2020
Phosphorites are mainly used by an agriculture industry (the production of phosphate fertilizers). They are also used, but with a much less importance, in a chemical industry as a raw material for the production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in the various types of sediments in the belt of the Albian (Lower Cretaceous) outcrops at the north-eastern margin of the Holy Cross Mts. (vicinities of Radom-Iłża-Annopol-Gościeradów-Modliborzyce). They are used for the production of the natural phosphate fertilizers. The exploitation of phosphorites started in Poland between the First and the Second World War. However, nowadays any of deposit is being under exploitation due to the economic reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
The actual Polish limit values of the parameters that defines the phosphorites deposit establish that: the maximum depth of deposits documentation is 400 meters below the surface, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in Table 1.
The abundance parameter deviates significantly from the limiting parameters that define the phosphorites deposit. Deposits are flooded which results in their potential exploitation, moreover, their significant parts have been built-up or covered by roads, railways and high-voltage lines. In extreme cases, it may cause the resources available for exploitations reduction as much as 50-80%. For these reasons, all of the phosphorites deposits were crossed out from “The balance…” in 2006 and the domestic demand for the phosphorites raw materials is fully covered by import. There is also lack of economic conditions for qualifying the phosphorites occurrences in Poland as the prognostic resources. In light of the current balancing criteria, such occurrences are not economically significant*.
Phosphorites were documented – on the basis of the more detailed deposit exploration – as one of the accompanying raw materials in the new geological documentation (the supplement No. 1) with recalculated resources of the glauconite-bearing sediments Niedźwiada II deposit approved in 2020. The deposit is located in Lubartów county in Lubelskie Voivodeship (Table 2). Phosphorites occur in the deposit in the form of hard phosphate concretions with irregular surface, of the grey-black color and with the granulation between 2 and 30 mm. The phosphate phase was defined as hydroxyapatite. These phosphorites are characterized by the high phosphorites content (the average content of P2O5 – 22.86%), with the limit values for phosphorites minimum 15% P2O5.
The state of the resources exploration and the state of the deposits development, together with the output amounts from particular deposits are presented in the Table 2.
Prepared by: Robert Bońda
* Gąsiewicz A., 2020 – ‘Fosforyty (phosphorites)’. In: ‘Bilans perspektywicznych zasobów kopalin Polski wg stanu na 31.12.2018 r.’ (eds. Szamałek K., Szuflicki M., Mizerski W.): 233-236. PIG-PIB, Warszawa [in Polish].
2019
Phosphorites are mainly used by an agriculture industry (the production of phosphate fertilizers). They are also used, but with a much less importance, in a chemical industry as a raw material for the production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in the various types of sediments in the belt of the Albian (Lower Cretaceous) outcrops at the north-eastern margin of the Holy Cross Mts. (vicinities of Radom-Iłża-Annopol-Gościeradów-Modliborzyce). They are used for the production of phosphate fertilizers) The exploitation of phosphorites started in Poland between the First and the Second World War. However, nowadays any of deposit is being under exploitation due to the economic reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
The actual Polish limit values of the parameters that defines the phosphorites deposit establish that: the maximum depth of deposits documentation is 400 meters below the surface, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in Table 1.
The abundance parameter deviates significantly from the limiting parameters that define the phosphorites deposit. Deposits are flooded which results in their potential exploitation, moreover, their significant parts have been built-up or covered by roads, railways and high-voltage lines. In extreme cases, it may cause the resources available for exploitations reduction as much as 50-80%. For these reasons, all of the phosphorites deposits were crossed out from “The balance…” in 2006 and the domestic demand for the phosphorites raw materials is fully covered by import. There is also lack of economic conditions for qualifying the phosphorites occurrences in Poland as the prognostic resources. In light of the current balancing criteria, such occurrences are not economically significant*.
Prepared by: Robert Bońda
* Gąsiewicz A., 2020 – ‘Fosforyty (phosphorites)’. In: ‘Bilans perspektywicznych zasobów kopalin Polski wg stanu na 31.12.2018 r.’ (eds. Szamałek K., Szuflicki M., Mizerski W.): 233-236. PIG-PIB, Warszawa.
2018
Phosphorites are mainly used by an agriculture industry (the production of phosphate fertilizers). They are also used, but with a much less importance, in a chemical industry as a raw material for the production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in the various types of sediments in the belt of the Albian (Lower Cretaceous) outcrops at the north-eastern margin of the Holy Cross Mts. (vicinities of Radom-Iłża-Annopol-Gościeradów-Modliborzyce). They are used for the production of phosphate fertilizers) The exploitation of phosphorites started in Poland between the First and the Second World War. However, nowadays any of deposit is being under exploitation due to the economical reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
The actual Polish limit values of the parameters that defines the phosphorites deposit establish that: the maximum depth of deposits documentation is 400 meters below the surface, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in Table 1.
At present, all Polish phosphorites deposits are abandoned as their limiting parameters are markedly below cut-off grade for the economic exploitation. Deposits are flooded and their significant parts were built-up or covered by roads, railways and high-voltage lines. It may sometimes cause the resources reduction by 50-80%. These were the reasons why in 2006 the deposits have been crossed out from ‘The balance…’ and a demand is fully covered by import.
Prepared by: Robert Bońda
2017
Phosphorites are mainly used by an agriculture industry for the production of phosphate fertilizers. They are also used in a chemical industry as a raw material for the production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in sandy marls and glauconitic sands in the belt of the Albian (Lower Cretaceous) outcrops at the north-eastern margin of the Holy Cross Mts. (vicinities of Radom-Iłża-Annopol-Gościeradów-Modliborzyce). The thickness of this phosphate-bearing series is varying from 0.2 m to 4 m. The content of P2O5 in the nodules is generally low, ranging from 13% to 22%. The concentration of the nodules in sediments of the phosphate-bearing series is also low, ranging from 280 kg/m2 to 900 kg/m2. It should be also added that the deposits are strongly saturated with water.
Phosphorites exploitation started in Poland between the First and the Second World War. Nowadays, any of deposit is being under exploitation due to the economical reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
Actual Polish limiting parameters for phosphorites deposits established that: the maximum depth of resources documentation is 400 metres below the surfaces, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in Table 1.
At present, all Polish phosphorites deposits are abandoned as their limiting parameters are markedly below cut-off grade for the economic exploitation. Deposits are flooded and their significant parts were built-up or covered by roads, railways and high-voltage lines. It may sometimes cause the resources reduction by 50-80%. These were the reasons why in 2006 the deposits have been crossed out from ‘The balance…’ and a demand is fully covered by import.
Prepared by: Robert Bońda
2016
Phosphorites are mainly used by an agriculture industry for the production of phosphate fertilizers. They are also used in a chemical industry as a raw material for production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in sandy marls and glauconitic sands in the belt of the Albian (Lower Cretaceous) outcrops at the north-eastern margin of the Holy Cross Mts. (vicinities of Radom-Iłża-Annopol-Gościeradów-Modliborzyce). The thickness of this phosphate-bearing series is varying from 0.2 m to 4 m. The content of P2O5 in the nodules is generally low, ranging from 13% to 22%. The concentration of the nodules in sediments of the phosphate-bearing series is also low, ranging from 280 kg/m2 to 900 kg/m2. It should be also added that the deposits are strongly saturated with water.
Phosphorites exploitation started in Poland between the First and the Second World War. Nowadays, any of deposit is being under exploitation due to the economical reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
Actual Polish limiting parameters for phosphorites deposits established that: the maximum depth of resources documentation is 400 metres below the surfaces, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in table 1.
At present, all Polish phosphorites deposits are abandoned as their limiting parameters are markedly below cut-off grade for the economic exploitation. Deposits are flooded and their significant parts were built-up or covered by roads, railways and high-voltage lines. It may sometimes cause the resources reduction by 50-80%. These were the reasons why in 2006 the deposits have been crossed out from ‘The balance…’ and demand is fully covered by import.
Prepared by: Robert Bońda
2015
Phosphorites are mainly used by agriculture industry for production of phosphate fertilizers. They are also used in chemical industry as raw material for production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in sandy marls and glauconitic sands in the belt of outcrops of the Albian (Lower Cretaceous) at the north-eastern margin of the Holy Cross Mts. Thickness of this phosphate-bearing series is varying from 0.2 m to 4 m. The content of P2O5 in the nodules is generally low, ranging from 13% to 22%. Concentration of the nodules in sediments of the phosphate-bearing series is also low, ranging from 280 kg/m2 to 900 kg/m2. It should be also added that the deposits are strongly saturated with water.
Phosphorites exploitation started in Poland between the First and the Second World War. Nowadays, any of deposit is being under exploitation due to economical reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
Actual Polish deposit criteria for phosphorites deposits established that: the maximum depth of resources documentation is 400 metres below the surfaces, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in table 1.
At present, all the Polish phosphorite deposits are abandoned as their reserve parameters are markedly below cut-off grade for economic exploitation. This was the reason why the deposits have been crossed out from ‘The balance…’.
Prepared by: Robert Bońda
2014
Phosphorites are mainly used by agriculture industry for production of phosphate fertilizers. They are also used in chemical industry as raw material for production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in sandy marls and glauconitic sands in the belt of outcrops of the Albian (Lower Cretaceous) at the north-eastern margin of the Holy Cross Mts. Thickness of this phosphate-bearing series is varying from 0.2 to 4 m. The content of P2O5 in the nodules is generally low, ranging from 13% to 22%. Concentration of the nodules in sediments of the phosphate-bearing series is also low, ranging from 280 kg/m2 to 900 kg/m2. It should be also added that the deposits are strongly saturated with water.
Phosphorites exploitation started in Poland between the First and the Second World War. Nowadays, any of deposit is being under exploitation due to economical reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
Actual Polish deposit criteria for phosphorites deposits established that: the maximum depth of resources documentation is 400 metres below the surfaces, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in table 1.
At present, all the Polish phosphorite deposits are abandoned as their reserve parameters are markedly below cut-off grade for economic exploitation. This was the reason why the deposits have been crossed out from Annual Report of Mineral Reserves-Resources and Groundwater Resources in Poland.
Prepared by: Robert Bońda
2013
Phosphorites are mainly used by agriculture industry for production of phosphate fertilizers. They are also used in chemical industry as raw material for production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in sandy marls and glauconitic sands in the belt of outcrops of the Albian (Lower Cretaceous) at the north-eastern margin of the Holy Cross Mts. Thickness of this phosphate-bearing series is varying from 0.2 to 4 m. The content of P2O5 in the nodules is generally low, ranging from 13% to 22%. Concentration of the nodules in sediments of the phosphate-bearing series is also low, ranging from 280 kg/m2 to 900 kg/m2. It should be also added that the deposits are strongly saturated with water.
Phosphorites exploitation started in Poland between the First and the Second World War. Nowadays, any of deposit is being under exploitation due to economical reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
Actual Polish deposit criteria for phosphorites deposits established that: the maximum depth of resources documentation is 400 metres below the surfaces, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in table 1.
At present, all the Polish phosphorite deposits are abandoned as their reserve parameters are markedly below cut-off grade for economic exploitation. This was the reason why the deposits have been crossed out from Annual Report of Mineral Reserves-Resources and Groundwater Resources in Poland.
Prepared by: Robert Bońda
2012
Phosphorites are mainly used by agriculture industry for production of phosphate fertilizers. They are also used in chemical industry as raw material for production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in sandy marls and glauconitic sands in the belt of outcrops of the Albian (Lower Cretaceous) at the north-eastern margin of the Holy Cross Mts. Thickness of this phosphate-bearing series is varying from 0.2 to 4 m. The content of P2O5 in the nodules is generally low, ranging from 13% to 22%. Concentration of the nodules in sediments of the phosphate-bearing series is also low, ranging from 280 kg/m2 to 900 kg/m2. It should be also added that the deposits are strongly saturated with water.
Phosphorites exploitation started in Poland between the First and the Second World War. Nowadays, any of deposit is being under exploitation due to economical reasons. The Chałupki mine was closed in 1961 and the Annopol mine in 1971.
Actual Polish deposit criteria for phosphorites deposits established that: the maximum depth of resources documentation is 400 metres below the surfaces, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in table 1.
At present, all the Polish phosphorite deposits are abandoned as their reserve parameters are markedly below cut-off grade for economic exploitation. This was the reason why the deposits have been crossed out from Annual Report of Mineral Reserves-Resources and Groundwater Resources in Poland.
Prepared by: Robert Bońda
2011
Phosphorites are mainly used by agriculture industry for production of phosphate fertilizers. They are also used in chemical industry as raw material for production of various phosphorus compounds.
In Poland phosphorites occur in the form of calcium phosphate-rich nodules in sandy marls and glauconitic sands in the belt of outcrops of the Albian (Lower Cretaceous) at the north-eastern margin of the Holy Cross Mts. Thickness of this phosphate-bearing series is varying from 0.2 to 4 m. The content of P2O5 in the nodules is generally low, ranging from 13% to 22%. Concentration of the nodules in sediments of the phosphate-bearing series is also low, ranging from 280 kg/m2 to 900 kg/m2. It should be also added that the deposits are strongly saturated with water.
Actual Polish deposit criteria for phosphorites deposits established that: the maximum depth of resources documentation is 400 metres below the surfaces, the minimum P2O5 content in calcium phosphate-rich nodules is 15% and the minimum affluence of calcium phosphate-rich nodules is 1,800 kg/m2. Qualitative parameters of the main phosphorites occurrences are presented in table 1.
At present, all the Polish phosphorite deposits are abandoned as their reserve parameters are markedly below cut-off grade for economic exploitation. This was the reason why the deposits have been crossed out from Annual Report of Mineral Reserves-Resources and Groundwater Resources in Poland.
Prepared by: Robert Bońda